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[PATCH v15 net-next 00/14] AccECN protocol patch series

by chia-yu.chang＠nokia-bell-labs.com

From: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> Hello, Please find the v15 AccECN protocol patch series, which covers the core functionality of Accurate ECN, AccECN negotiation, AccECN TCP options, and AccECN failure handling. The Accurate ECN draft can be found in https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-accurate-ecn-28, and it will become RFC9768. This patch series is part of the full AccECN patch series, which is available at https://github.com/L4STeam/linux-net-next/commits/upstream_l4steam/ Best Regards, Chia-Yu --- v15 (14-Aug-205) - Update pahole results in commit messages - Accurate ECN will become RFC9768 v14 (22-Jul-2025) - Add missing const for struct tcp_sock of tcp_accecn_option_beacon_check() of #11 (Simon Horman <horms(a)kernel.org>) v13 (18-Jul-2025) - Implement tcp_accecn_extract_syn_ect() and tcp_accecn_reflector_flags() with static array lookup of patch #6 (Paolo Abeni <pabeni(a)redhat.com>) - Fix typos in comments of #6 and remove patch #7 of v12 about simulatenous connect (Paolo Abeni <pabeni(a)redhat.com>) - Move TCP_ACCECN_E1B_INIT_OFFSET, TCP_ACCECN_E0B_INIT_OFFSET, and TCP_ACCECN_CEB_INIT_OFFSET from patch #7 to #11 (Paolo Abeni <pabeni(a)redhat.com>) - Use static array lookup in tcp_accecn_optfield_to_ecnfield() of patch #11 (Paolo Abeni <pabeni(a)redhat.com>) - Return false when WARN_ON_ONCE() is true in tcp_accecn_process_option() of patch #11 (Paolo Abeni <pabeni(a)redhat.com>) - Make synack_ecn_bytes as static const array and use const u32 pointer in tcp_options_write() of #11 (Paolo Abeni <pabeni(a)redhat.com>) - Use ALIGN() and ALIGN_DOWN() in tcp_options_fit_accecn() to pad TCP AccECN option to dword of #11 (Paolo Abeni <pabeni(a)redhat.com>) - Return TCP_ACCECN_OPT_FAIL_SEEN if WARN_ON_ONCE() is true in tcp_accecn_option_init() of #12 (Paolo Abeni <pabeni(a)redhat.com>) v12 (04-Jul-2025) - Fix compilation issues with some intermediate patches in v11 - Add more comments for AccECN helpers of tcp_ecn.h v11 (03-Jul-2025) - Fix compilation issues with some intermediate patches in v10 v10 (02-Jul-2025) - Add new patch of separated header file include/net/tcp_ecn.h to include ECN and AccECN functions (Eric Dumazet <edumazet(a)google.com>) - Add comments on the AccECN helper functions in tcp_ecn.h (Eric Dumazet <edumazet(a)google.com>) - Add documentation of tcp_ecn, tcp_ecn_option, tcp_ecn_beacon in ip-sysctl.rst to the corresponding patch (Eric Dumazet <edumazet(a)google.com>) - Split wait third ACK functionality into a separated patch from AccECN negotiation patch (Eric Dumazet <edumazet(a)google.com>) - Add READ_ONCE() over every reads of sysctl for all patches in the series (Eric Dumazet <edumazet(a)google.com>) - Merge heuristics of AccECN option ceb/cep and ACE field multi-wrap into a single patch - Add a table of SACK block reduction and required AccECN field in patch #15 commit message (Eric Dumazet <edumazet(a)google.com>) v9 (21-Jun-2025) - Use tcp_data_ecn_check() to set TCP_ECN_SEE flag only for RFC3168 ECN (Paolo Abeni <pabeni(a)redhat.com>) - Add comments about setting TCP_ECN_SEEN flag for RFC3168 and Accruate ECN (Paolo Abeni <pabeni(a)redhat.com>) - Restruct the code in the for loop of tcp_accecn_process_option() (Paolo Abeni <pabeni(a)redhat.com>) - Remove ecn_bytes and add use_synack_ecn_bytes flag to identify whether syn_ack_bytes or received_ecn_bytes is used (Paolo Abeni <pabeni(a)redhat.com>) - Replace leftover_bytes and leftover_size with leftover_highbyte and leftover_lowbyte and add comments in tcp_options_write() (Paolo Abeni <pabeni(a)redhat.com>) - Add comments and commit message about the 1st retx SYN still attempt AccECN negotiation (Paolo Abeni <pabeni(a)redhat.com>) v8 (10-Jun-2025) - Add new helper function tcp_ecn_received_counters_payload() in #6 (Paolo Abeni <pabeni(a)redhat.com>) - Set opts->num_sack_blocks=0 to avoid potential undefined value in #8 (Paolo Abeni <pabeni(a)redhat.com>) - Reset leftover_size to 2 once leftover_bytes is used in #9 (Paolo Abeni <pabeni(a)redhat.com>) - Add new helper function tcp_accecn_opt_demand_min() in #10 (Paolo Abeni <pabeni(a)redhat.com>) - Add new helper function tcp_accecn_saw_opt_fail_recv() in #11 (Paolo Abeni <pabeni(a)redhat.com>) - Update tcp_options_fit_accecn() to avoid using recursion in #14 (Paolo Abeni <pabeni(a)redhat.com>) v7 (14-May-2025) - Modify group sizes of tcp_sock_write_txrx and tcp_sock_write_rx in #3 based on pahole results (Paolo Abeni <pabeni(a)redhat.com>) - Fix the issue in #4 and #5 where the RFC3168 ECN behavior in tcp_ecn_send() is changed (Paolo Abeni <pabeni(a)redhat.com>) - Modify group size of tcp_sock_write_txrx in #4 and #6 based on pahole results (Paolo Abeni <pabeni(a)redhat.com>) - Update commit message for #9 to explain the increase in tcp_sock_write_rx group size - Modify group size of tcp_sock_write_tx in #10 based on pahole results v6 (09-May-2025) - Add #3 to utilize exisintg holes of tcp_sock_write_txrx group for later patches (#4, #9, #10) with new u8 members (Paolo Abeni <pabeni(a)redhat.com>) - Add pahole outcomes before and after commit in #4, #5, #6, #9, #10, #15 (Paolo Abeni <pabeni(a)redhat.com>) - Define new helper function tcp_send_ack_reflect_ect() for sending ACK with reflected ECT in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add comments for function tcp_ecn_rcv_synack() in #5 (Paolo Abeni <pabeni(a)redhat.com>) - Add enum/define to be used by sysctl_tcp_ecn in #5, sysctl_tcp_ecn_option in #9, and sysctl_tcp_ecn_option_beacon in #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move accecn_fail_mode and saw_accecn_opt in #5 and #11 to use exisintg holes of tcp_sock (Paolo Abeni <pabeni(a)redhat.com>) - Change data type of new members of tcp_request_sock and move them to the end of struct in #5 and #11 (Paolo Abeni <pabeni(a)redhat.com>) - Move new members of tcp_info to the end of struct in #6 (Paolo Abeni <pabeni(a)redhat.com>) - Merge previous #7 into #9 (Paolo Abeni <pabeni(a)redhat.com>) - Mask ecnfield with INET_ECN_MASK to remove WARN_ONCE in #9 (Paolo Abeni <pabeni(a)redhat.com>) - Reduce the indentation levels for reabability in #9 and #10 (Paolo Abeni <pabeni(a)redhat.com>) - Move delivered_ecn_bytes to the RX group in #9, accecn_opt_tstamp to the TX group in #10, pkts_acked_ewma to the RX group in #15 (Paolo Abeni <pabeni(a)redhat.com>) - Add changes in Documentation/networking/net_cachelines/tcp_sock.rst for new tcp_sock members in #3, #5, #6, #9, #10, #15 v5 (22-Apr-2025) - Further fix for 32-bit ARM alignment in tcp.c (Simon Horman <horms(a)kernel.org>) v4 (18-Apr-2025) - Fix 32-bit ARM assertion for alignment requirement (Simon Horman <horms(a)kernel.org>) v3 (14-Apr-2025) - Fix patch apply issue in v2 (Jakub Kicinski <kuba(a)kernel.org>) v2 (18-Mar-2025) - Add one missing patch from the previous AccECN protocol preparation patch series to this patch series. --- Chia-Yu Chang (5): tcp: reorganize tcp_sock_write_txrx group for variables later tcp: ecn functions in separated include file tcp: accecn: AccECN option send control tcp: accecn: AccECN option failure handling tcp: accecn: try to fit AccECN option with SACK Ilpo Järvinen (9): tcp: reorganize SYN ECN code tcp: fast path functions later tcp: AccECN core tcp: accecn: AccECN negotiation tcp: accecn: add AccECN rx byte counters tcp: accecn: AccECN needs to know delivered bytes tcp: sack option handling improvements tcp: accecn: AccECN option tcp: accecn: AccECN option ceb/cep and ACE field multi-wrap heuristics Documentation/networking/ip-sysctl.rst | 55 +- .../networking/net_cachelines/tcp_sock.rst | 12 + include/linux/tcp.h | 32 +- include/net/netns/ipv4.h | 2 + include/net/tcp.h | 87 ++- include/net/tcp_ecn.h | 649 ++++++++++++++++++ include/uapi/linux/tcp.h | 7 + net/ipv4/syncookies.c | 4 + net/ipv4/sysctl_net_ipv4.c | 19 + net/ipv4/tcp.c | 28 +- net/ipv4/tcp_input.c | 353 ++++++++-- net/ipv4/tcp_ipv4.c | 8 +- net/ipv4/tcp_minisocks.c | 40 +- net/ipv4/tcp_output.c | 294 ++++++-- net/ipv6/syncookies.c | 2 + net/ipv6/tcp_ipv6.c | 1 + 16 files changed, 1409 insertions(+), 184 deletions(-) create mode 100644 include/net/tcp_ecn.h -- 2.34.1

1 week, 4 days

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[PATCH v8 00/29] KVM: arm64: Implement support for SME

by Mark Brown

I've removed the RFC tag from this version of the series, but the items that I'm looking for feedback on remains the same: - The userspace ABI, in particular: - The vector length used for the SVE registers, access to the SVE registers and access to ZA and (if available) ZT0 depending on the current state of PSTATE.{SM,ZA}. - The use of a single finalisation for both SVE and SME. - The addition of control for enabling fine grained traps in a similar manner to FGU but without the UNDEF, I'm not clear if this is desired at all and at present this requires symmetric read and write traps like FGU. That seemed like it might be desired from an implementation point of view but we already have one case where we enable an asymmetric trap (for ARM64_WORKAROUND_AMPERE_AC03_CPU_38) and it seems generally useful to enable asymmetrically. This series implements support for SME use in non-protected KVM guests. Much of this is very similar to SVE, the main additional challenge that SME presents is that it introduces a new vector length similar to the SVE vector length and two new controls which change the registers seen by guests: - PSTATE.ZA enables the ZA matrix register and, if SME2 is supported, the ZT0 LUT register. - PSTATE.SM enables streaming mode, a new floating point mode which uses the SVE register set with the separately configured SME vector length. In streaming mode implementation of the FFR register is optional. It is also permitted to build systems which support SME without SVE, in this case when not in streaming mode no SVE registers or instructions are available. Further, there is no requirement that there be any overlap in the set of vector lengths supported by SVE and SME in a system, this is expected to be a common situation in practical systems. Since there is a new vector length to configure we introduce a new feature parallel to the existing SVE one with a new pseudo register for the streaming mode vector length. Due to the overlap with SVE caused by streaming mode rather than finalising SME as a separate feature we use the existing SVE finalisation to also finalise SME, a new define KVM_ARM_VCPU_VEC is provided to help make user code clearer. Finalising SVE and SME separately would introduce complication with register access since finalising SVE makes the SVE registers writeable by userspace and doing multiple finalisations results in an error being reported. Dealing with a state where the SVE registers are writeable due to one of SVE or SME being finalised but may have their VL changed by the other being finalised seems like needless complexity with minimal practical utility, it seems clearer to just express directly that only one finalisation can be done in the ABI. Access to the floating point registers follows the architecture: - When both SVE and SME are present: - If PSTATE.SM == 0 the vector length used for the Z and P registers is the SVE vector length. - If PSTATE.SM == 1 the vector length used for the Z and P registers is the SME vector length. - If only SME is present: - If PSTATE.SM == 0 the Z and P registers are inaccessible and the floating point state accessed via the encodings for the V registers. - If PSTATE.SM == 1 the vector length used for the Z and P registers - The SME specific ZA and ZT0 registers are only accessible if SVCR.ZA is 1. The VMM must understand this, in particular when loading state SVCR should be configured before other state. It should be noted that while the architecture refers to PSTATE.SM and PSTATE.ZA these PSTATE bits are not preserved in SPSR_ELx, they are only accessible via SVCR. There are a large number of subfeatures for SME, most of which only offer additional instructions but some of which (SME2 and FA64) add architectural state. These are configured via the ID registers as per usual. Protected KVM supported, with the implementation maintaining the existing restriction that the hypervisor will refuse to run if streaming mode or ZA is enabled. This both simplfies the code and avoids the need to allocate storage for host ZA and ZT0 state, there seems to be little practical use case for supporting this and the memory usage would be non-trivial. The new KVM_ARM_VCPU_VEC feature and ZA and ZT0 registers have not been added to the get-reg-list selftest, the idea of supporting additional features there without restructuring the program to generate all possible feature combinations has been rejected. I will post a separate series which does that restructuring. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v8: - Small fixes in ABI documentation. - Link to v7: https://lore.kernel.org/r/20250822-kvm-arm64-sme-v7-0-7a65d82b8b10@kernel.o… Changes in v7: - Rebase onto v6.17-rc1. - Handle SMIDR_EL1 as a VM wide ID register and use this in feat_sme_smps(). - Expose affinity fields in SMIDR_EL1. - Remove SMPRI_EL1 from vcpu_sysreg, the value is always 0 currently. - Prevent userspace writes to SMPRIMAP_EL2. - Link to v6: https://lore.kernel.org/r/20250625-kvm-arm64-sme-v6-0-114cff4ffe04@kernel.o… Changes in v6: - Rebase onto v6.16-rc3. - Link to v5: https://lore.kernel.org/r/20250417-kvm-arm64-sme-v5-0-f469a2d5f574@kernel.o… Changes in v5: - Rebase onto v6.15-rc2. - Add pKVM guest support. - Always restore SVCR. - Link to v4: https://lore.kernel.org/r/20250214-kvm-arm64-sme-v4-0-d64a681adcc2@kernel.o… Changes in v4: - Rebase onto v6.14-rc2 and Mark Rutland's fixes. - Expose SME to nested guests. - Additional cleanups and test fixes following on from the rebase. - Flush register state on VMM PSTATE.{SM,ZA}. - Link to v3: https://lore.kernel.org/r/20241220-kvm-arm64-sme-v3-0-05b018c1ffeb@kernel.o… Changes in v3: - Rebase onto v6.12-rc2. - Link to v2: https://lore.kernel.org/r/20231222-kvm-arm64-sme-v2-0-da226cb180bb@kernel.o… Changes in v2: - Rebase onto v6.7-rc3. - Configure subfeatures based on host system only. - Complete nVHE support. - There was some snafu with sending v1 out, it didn't make it to the lists but in case it hit people's inboxes I'm sending as v2. --- Mark Brown (29): arm64/sysreg: Update SMIDR_EL1 to DDI0601 2025-06 arm64/fpsimd: Update FA64 and ZT0 enables when loading SME state arm64/fpsimd: Decide to save ZT0 and streaming mode FFR at bind time arm64/fpsimd: Check enable bit for FA64 when saving EFI state arm64/fpsimd: Determine maximum virtualisable SME vector length KVM: arm64: Introduce non-UNDEF FGT control KVM: arm64: Pay attention to FFR parameter in SVE save and load KVM: arm64: Pull ctxt_has_ helpers to start of sysreg-sr.h KVM: arm64: Move SVE state access macros after feature test macros KVM: arm64: Rename SVE finalization constants to be more general KVM: arm64: Document the KVM ABI for SME KVM: arm64: Define internal features for SME KVM: arm64: Rename sve_state_reg_region KVM: arm64: Store vector lengths in an array KVM: arm64: Implement SME vector length configuration KVM: arm64: Support SME control registers KVM: arm64: Support TPIDR2_EL0 KVM: arm64: Support SME identification registers for guests KVM: arm64: Support SME priority registers KVM: arm64: Provide assembly for SME register access KVM: arm64: Support userspace access to streaming mode Z and P registers KVM: arm64: Flush register state on writes to SVCR.SM and SVCR.ZA KVM: arm64: Expose SME specific state to userspace KVM: arm64: Context switch SME state for guests KVM: arm64: Handle SME exceptions KVM: arm64: Expose SME to nested guests KVM: arm64: Provide interface for configuring and enabling SME for guests KVM: arm64: selftests: Add SME system registers to get-reg-list KVM: arm64: selftests: Add SME to set_id_regs test Documentation/virt/kvm/api.rst | 115 ++++++++--- arch/arm64/include/asm/fpsimd.h | 26 +++ arch/arm64/include/asm/kvm_emulate.h | 6 + arch/arm64/include/asm/kvm_host.h | 169 ++++++++++++--- arch/arm64/include/asm/kvm_hyp.h | 5 +- arch/arm64/include/asm/kvm_pkvm.h | 2 +- arch/arm64/include/asm/vncr_mapping.h | 2 + arch/arm64/include/uapi/asm/kvm.h | 33 +++ arch/arm64/kernel/cpufeature.c | 2 - arch/arm64/kernel/fpsimd.c | 89 ++++---- arch/arm64/kvm/arm.c | 10 + arch/arm64/kvm/config.c | 8 +- arch/arm64/kvm/fpsimd.c | 28 ++- arch/arm64/kvm/guest.c | 252 ++++++++++++++++++++--- arch/arm64/kvm/handle_exit.c | 14 ++ arch/arm64/kvm/hyp/fpsimd.S | 28 ++- arch/arm64/kvm/hyp/include/hyp/switch.h | 175 ++++++++++++++-- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 110 ++++++---- arch/arm64/kvm/hyp/nvhe/hyp-main.c | 86 ++++++-- arch/arm64/kvm/hyp/nvhe/pkvm.c | 85 ++++++-- arch/arm64/kvm/hyp/nvhe/switch.c | 4 +- arch/arm64/kvm/hyp/nvhe/sys_regs.c | 6 + arch/arm64/kvm/hyp/vhe/switch.c | 17 +- arch/arm64/kvm/hyp/vhe/sysreg-sr.c | 7 + arch/arm64/kvm/nested.c | 3 +- arch/arm64/kvm/reset.c | 156 ++++++++++---- arch/arm64/kvm/sys_regs.c | 141 ++++++++++++- arch/arm64/tools/sysreg | 8 +- include/uapi/linux/kvm.h | 1 + tools/testing/selftests/kvm/arm64/get-reg-list.c | 15 +- tools/testing/selftests/kvm/arm64/set_id_regs.c | 27 ++- 31 files changed, 1327 insertions(+), 303 deletions(-) --- base-commit: 062b3e4a1f880f104a8d4b90b767788786aa7b78 change-id: 20230301-kvm-arm64-sme-06a1246d3636 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 week, 4 days

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[PATCH bpf-next v2 2/2] selftests/bpf: Test kfunc bpf_strcasecmp

by Rong Tao

From: Rong Tao <rongtao(a)cestc.cn> Add testsuites for kfunc bpf_strcasecmp. Signed-off-by: Rong Tao <rongtao(a)cestc.cn> --- tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c | 6 ++++++ tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c | 1 + tools/testing/selftests/bpf/progs/string_kfuncs_success.c | 5 +++++ 3 files changed, 12 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c b/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c index 53af438bd998..99d72c68f76a 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c @@ -31,6 +31,8 @@ char *invalid_kern_ptr = (char *)-1; /* Passing NULL to string kfuncs (treated as a userspace ptr) */ SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_null1(void *ctx) { return bpf_strcmp(NULL, "hello"); } SEC("syscall") __retval(USER_PTR_ERR)int test_strcmp_null2(void *ctx) { return bpf_strcmp("hello", NULL); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_null1(void *ctx) { return bpf_strcasecmp(NULL, "HELLO"); } +SEC("syscall") __retval(USER_PTR_ERR)int test_strcasecmp_null2(void *ctx) { return bpf_strcasecmp("HELLO", NULL); } SEC("syscall") __retval(USER_PTR_ERR)int test_strchr_null(void *ctx) { return bpf_strchr(NULL, 'a'); } SEC("syscall") __retval(USER_PTR_ERR)int test_strchrnul_null(void *ctx) { return bpf_strchrnul(NULL, 'a'); } SEC("syscall") __retval(USER_PTR_ERR)int test_strnchr_null(void *ctx) { return bpf_strnchr(NULL, 1, 'a'); } @@ -49,6 +51,8 @@ SEC("syscall") __retval(USER_PTR_ERR)int test_strnstr_null2(void *ctx) { return /* Passing userspace ptr to string kfuncs */ SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr1(void *ctx) { return bpf_strcmp(user_ptr, "hello"); } SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr2(void *ctx) { return bpf_strcmp("hello", user_ptr); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr1(void *ctx) { return bpf_strcasecmp(user_ptr, "HELLO"); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr2(void *ctx) { return bpf_strcasecmp("HELLO", user_ptr); } SEC("syscall") __retval(USER_PTR_ERR) int test_strchr_user_ptr(void *ctx) { return bpf_strchr(user_ptr, 'a'); } SEC("syscall") __retval(USER_PTR_ERR) int test_strchrnul_user_ptr(void *ctx) { return bpf_strchrnul(user_ptr, 'a'); } SEC("syscall") __retval(USER_PTR_ERR) int test_strnchr_user_ptr(void *ctx) { return bpf_strnchr(user_ptr, 1, 'a'); } @@ -69,6 +73,8 @@ SEC("syscall") __retval(USER_PTR_ERR) int test_strnstr_user_ptr2(void *ctx) { re /* Passing invalid kernel ptr to string kfuncs should always return -EFAULT */ SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault1(void *ctx) { return bpf_strcmp(invalid_kern_ptr, "hello"); } SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault2(void *ctx) { return bpf_strcmp("hello", invalid_kern_ptr); } +SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault1(void *ctx) { return bpf_strcasecmp(invalid_kern_ptr, "HELLO"); } +SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault2(void *ctx) { return bpf_strcasecmp("HELLO", invalid_kern_ptr); } SEC("syscall") __retval(-EFAULT) int test_strchr_pagefault(void *ctx) { return bpf_strchr(invalid_kern_ptr, 'a'); } SEC("syscall") __retval(-EFAULT) int test_strchrnul_pagefault(void *ctx) { return bpf_strchrnul(invalid_kern_ptr, 'a'); } SEC("syscall") __retval(-EFAULT) int test_strnchr_pagefault(void *ctx) { return bpf_strnchr(invalid_kern_ptr, 1, 'a'); } diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c b/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c index 89fb4669b0e9..e41cc5601994 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c @@ -7,6 +7,7 @@ char long_str[XATTR_SIZE_MAX + 1]; SEC("syscall") int test_strcmp_too_long(void *ctx) { return bpf_strcmp(long_str, long_str); } +SEC("syscall") int test_strcasecmp_too_long(void *ctx) { return bpf_strcasecmp(long_str, long_str); } SEC("syscall") int test_strchr_too_long(void *ctx) { return bpf_strchr(long_str, 'b'); } SEC("syscall") int test_strchrnul_too_long(void *ctx) { return bpf_strchrnul(long_str, 'b'); } SEC("syscall") int test_strnchr_too_long(void *ctx) { return bpf_strnchr(long_str, sizeof(long_str), 'b'); } diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_success.c b/tools/testing/selftests/bpf/progs/string_kfuncs_success.c index 46697f381878..67830456637b 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_success.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_success.c @@ -12,6 +12,11 @@ char str[] = "hello world"; /* Functional tests */ __test(0) int test_strcmp_eq(void *ctx) { return bpf_strcmp(str, "hello world"); } __test(1) int test_strcmp_neq(void *ctx) { return bpf_strcmp(str, "hello"); } +__test(0) int test_strcasecmp_eq1(void *ctx) { return bpf_strcasecmp(str, "hello world"); } +__test(0) int test_strcasecmp_eq2(void *ctx) { return bpf_strcasecmp(str, "HELLO WORLD"); } +__test(0) int test_strcasecmp_eq3(void *ctx) { return bpf_strcasecmp(str, "HELLO world"); } +__test(1) int test_strcasecmp_neq1(void *ctx) { return bpf_strcasecmp(str, "hello"); } +__test(1) int test_strcasecmp_neq2(void *ctx) { return bpf_strcasecmp(str, "HELLO"); } __test(1) int test_strchr_found(void *ctx) { return bpf_strchr(str, 'e'); } __test(11) int test_strchr_null(void *ctx) { return bpf_strchr(str, '\0'); } __test(-ENOENT) int test_strchr_notfound(void *ctx) { return bpf_strchr(str, 'x'); } -- 2.51.0

1 week, 5 days

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[PATCH bpf-next v3 2/2] selftests/bpf: Test kfunc bpf_strcasecmp

by Rong Tao

From: Rong Tao <rongtao(a)cestc.cn> Add testsuites for kfunc bpf_strcasecmp. Signed-off-by: Rong Tao <rongtao(a)cestc.cn> --- tools/testing/selftests/bpf/prog_tests/string_kfuncs.c | 1 + tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c | 6 ++++++ tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c | 1 + tools/testing/selftests/bpf/progs/string_kfuncs_success.c | 5 +++++ 4 files changed, 13 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/string_kfuncs.c b/tools/testing/selftests/bpf/prog_tests/string_kfuncs.c index 35af8044d059..4d66fad3c8bd 100644 --- a/tools/testing/selftests/bpf/prog_tests/string_kfuncs.c +++ b/tools/testing/selftests/bpf/prog_tests/string_kfuncs.c @@ -8,6 +8,7 @@ static const char * const test_cases[] = { "strcmp", + "strcasecmp", "strchr", "strchrnul", "strnchr", diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c b/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c index 53af438bd998..99d72c68f76a 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_failure1.c @@ -31,6 +31,8 @@ char *invalid_kern_ptr = (char *)-1; /* Passing NULL to string kfuncs (treated as a userspace ptr) */ SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_null1(void *ctx) { return bpf_strcmp(NULL, "hello"); } SEC("syscall") __retval(USER_PTR_ERR)int test_strcmp_null2(void *ctx) { return bpf_strcmp("hello", NULL); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_null1(void *ctx) { return bpf_strcasecmp(NULL, "HELLO"); } +SEC("syscall") __retval(USER_PTR_ERR)int test_strcasecmp_null2(void *ctx) { return bpf_strcasecmp("HELLO", NULL); } SEC("syscall") __retval(USER_PTR_ERR)int test_strchr_null(void *ctx) { return bpf_strchr(NULL, 'a'); } SEC("syscall") __retval(USER_PTR_ERR)int test_strchrnul_null(void *ctx) { return bpf_strchrnul(NULL, 'a'); } SEC("syscall") __retval(USER_PTR_ERR)int test_strnchr_null(void *ctx) { return bpf_strnchr(NULL, 1, 'a'); } @@ -49,6 +51,8 @@ SEC("syscall") __retval(USER_PTR_ERR)int test_strnstr_null2(void *ctx) { return /* Passing userspace ptr to string kfuncs */ SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr1(void *ctx) { return bpf_strcmp(user_ptr, "hello"); } SEC("syscall") __retval(USER_PTR_ERR) int test_strcmp_user_ptr2(void *ctx) { return bpf_strcmp("hello", user_ptr); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr1(void *ctx) { return bpf_strcasecmp(user_ptr, "HELLO"); } +SEC("syscall") __retval(USER_PTR_ERR) int test_strcasecmp_user_ptr2(void *ctx) { return bpf_strcasecmp("HELLO", user_ptr); } SEC("syscall") __retval(USER_PTR_ERR) int test_strchr_user_ptr(void *ctx) { return bpf_strchr(user_ptr, 'a'); } SEC("syscall") __retval(USER_PTR_ERR) int test_strchrnul_user_ptr(void *ctx) { return bpf_strchrnul(user_ptr, 'a'); } SEC("syscall") __retval(USER_PTR_ERR) int test_strnchr_user_ptr(void *ctx) { return bpf_strnchr(user_ptr, 1, 'a'); } @@ -69,6 +73,8 @@ SEC("syscall") __retval(USER_PTR_ERR) int test_strnstr_user_ptr2(void *ctx) { re /* Passing invalid kernel ptr to string kfuncs should always return -EFAULT */ SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault1(void *ctx) { return bpf_strcmp(invalid_kern_ptr, "hello"); } SEC("syscall") __retval(-EFAULT) int test_strcmp_pagefault2(void *ctx) { return bpf_strcmp("hello", invalid_kern_ptr); } +SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault1(void *ctx) { return bpf_strcasecmp(invalid_kern_ptr, "HELLO"); } +SEC("syscall") __retval(-EFAULT) int test_strcasecmp_pagefault2(void *ctx) { return bpf_strcasecmp("HELLO", invalid_kern_ptr); } SEC("syscall") __retval(-EFAULT) int test_strchr_pagefault(void *ctx) { return bpf_strchr(invalid_kern_ptr, 'a'); } SEC("syscall") __retval(-EFAULT) int test_strchrnul_pagefault(void *ctx) { return bpf_strchrnul(invalid_kern_ptr, 'a'); } SEC("syscall") __retval(-EFAULT) int test_strnchr_pagefault(void *ctx) { return bpf_strnchr(invalid_kern_ptr, 1, 'a'); } diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c b/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c index 89fb4669b0e9..e41cc5601994 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_failure2.c @@ -7,6 +7,7 @@ char long_str[XATTR_SIZE_MAX + 1]; SEC("syscall") int test_strcmp_too_long(void *ctx) { return bpf_strcmp(long_str, long_str); } +SEC("syscall") int test_strcasecmp_too_long(void *ctx) { return bpf_strcasecmp(long_str, long_str); } SEC("syscall") int test_strchr_too_long(void *ctx) { return bpf_strchr(long_str, 'b'); } SEC("syscall") int test_strchrnul_too_long(void *ctx) { return bpf_strchrnul(long_str, 'b'); } SEC("syscall") int test_strnchr_too_long(void *ctx) { return bpf_strnchr(long_str, sizeof(long_str), 'b'); } diff --git a/tools/testing/selftests/bpf/progs/string_kfuncs_success.c b/tools/testing/selftests/bpf/progs/string_kfuncs_success.c index 46697f381878..67830456637b 100644 --- a/tools/testing/selftests/bpf/progs/string_kfuncs_success.c +++ b/tools/testing/selftests/bpf/progs/string_kfuncs_success.c @@ -12,6 +12,11 @@ char str[] = "hello world"; /* Functional tests */ __test(0) int test_strcmp_eq(void *ctx) { return bpf_strcmp(str, "hello world"); } __test(1) int test_strcmp_neq(void *ctx) { return bpf_strcmp(str, "hello"); } +__test(0) int test_strcasecmp_eq1(void *ctx) { return bpf_strcasecmp(str, "hello world"); } +__test(0) int test_strcasecmp_eq2(void *ctx) { return bpf_strcasecmp(str, "HELLO WORLD"); } +__test(0) int test_strcasecmp_eq3(void *ctx) { return bpf_strcasecmp(str, "HELLO world"); } +__test(1) int test_strcasecmp_neq1(void *ctx) { return bpf_strcasecmp(str, "hello"); } +__test(1) int test_strcasecmp_neq2(void *ctx) { return bpf_strcasecmp(str, "HELLO"); } __test(1) int test_strchr_found(void *ctx) { return bpf_strchr(str, 'e'); } __test(11) int test_strchr_null(void *ctx) { return bpf_strchr(str, '\0'); } __test(-ENOENT) int test_strchr_notfound(void *ctx) { return bpf_strchr(str, 'x'); } -- 2.51.0

1 week, 5 days

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[PATCH bpf-next v3 0/2] bpf: Add kfunc bpf_strcasecmp()

by Rong Tao

Kfunc already support bpf_strcmp, this patchset introduce bpf_strcasecmp and add some selftests. Rong Tao (2): bpf: add bpf_strcasecmp kfunc selftests/bpf: Test kfunc bpf_strcasecmp kernel/bpf/helpers.c | 68 +++++++++++++------ .../selftests/bpf/prog_tests/string_kfuncs.c | 1 + .../bpf/progs/string_kfuncs_failure1.c | 6 ++ .../bpf/progs/string_kfuncs_failure2.c | 1 + .../bpf/progs/string_kfuncs_success.c | 5 ++ 5 files changed, 61 insertions(+), 20 deletions(-) --- v3: Update prog_tests/string_kfuncs.c for "strcasecmp"; v2: Remove __ign prefix from __bpf_strcasecmp and add E2BIG failure test; https://lore.kernel.org/lkml/tencent_8646158457D4511C447C833B21B3ACF6CB07@q… v1: https://lore.kernel.org/lkml/tencent_5AE811A28781BE106AD6CDE59F4ADD2BFA06@q… -- 2.51.0

1 week, 5 days

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[PATCH net-next 1/2] selftests: drv-net: rss_ctx: use Netlink for timed reconfig

by Jakub Kicinski

The rss_ctx test has gotten pretty flaky after I increased the queue count in NIPA 2->3. Not 100% clear why. We get a lot of failures in the rss_ctx.test_hitless_key_update case. Looking closer it appears that the failures are mostly due to startup costs. I measured the following timing for ethtool -X: - python cmd(shell=True) : 150-250msec - python cmd(shell=False) : 50- 70msec - timed in bash : 45- 55msec - YNL Netlink call : 2- 4msec - .set_rxfh callback : 1- 2msec The target in the test was set to 200msec. We were mostly measuring ethtool startup cost it seems. Switch to YNL since it's 100x faster. Lower the pass criteria to ~75msec, no real science behind this number but we removed ~150msec of overhead, and the old target was 200msec. So any driver that was passing previously should still pass with 75msec. Separately we should probably follow up on defaulting to shell=False, when script doesn't explicitly ask for True, because the overhead is rather significant. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- tools/testing/selftests/drivers/net/hw/rss_ctx.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py index 9838b8457e5a..3fc5688605b5 100755 --- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py +++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py @@ -335,19 +335,20 @@ from lib.py import ethtool, ip, defer, GenerateTraffic, CmdExitFailure data = get_rss(cfg) key_len = len(data['rss-hash-key']) - key = _rss_key_rand(key_len) + ethnl = EthtoolFamily() + key = random.randbytes(key_len) tgen = GenerateTraffic(cfg) try: errors0, carrier0 = get_drop_err_sum(cfg) t0 = datetime.datetime.now() - ethtool(f"-X {cfg.ifname} hkey " + _rss_key_str(key)) + ethnl.rss_set({"header": {"dev-index": cfg.ifindex}, "hkey": key}) t1 = datetime.datetime.now() errors1, carrier1 = get_drop_err_sum(cfg) finally: tgen.wait_pkts_and_stop(5000) - ksft_lt((t1 - t0).total_seconds(), 0.2) + ksft_lt((t1 - t0).total_seconds(), 0.075) ksft_eq(errors1 - errors1, 0) ksft_eq(carrier1 - carrier0, 0) -- 2.51.0

1 week, 5 days

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[PATCH] selftests/fs/mount-notify: Fix compilation failure.

by Xing Guo

Commit c6d9775c2066 ("selftests/fs/mount-notify: build with tools include dir") introduces the struct __kernel_fsid_t to decouple dependency with headers_install. The commit forgets to define a macro for __kernel_fsid_t and it will cause type re-definition issue. Signed-off-by: Xing Guo <higuoxing(a)gmail.com> --- .../mount-notify/mount-notify_test.c | 17 ++++++++--------- .../mount-notify/mount-notify_test_ns.c | 18 ++++++++---------- 2 files changed, 16 insertions(+), 19 deletions(-) diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c index 63ce708d93ed..e4b7c2b457ee 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test.c @@ -2,6 +2,13 @@ // Copyright (c) 2025 Miklos Szeredi <miklos(a)szeredi.hu> #define _GNU_SOURCE + +// Needed for linux/fanotify.h +typedef struct { + int val[2]; +} __kernel_fsid_t; +#define __kernel_fsid_t __kernel_fsid_t + #include <fcntl.h> #include <sched.h> #include <stdio.h> @@ -10,20 +17,12 @@ #include <sys/mount.h> #include <unistd.h> #include <sys/syscall.h> +#include <sys/fanotify.h> #include "../../kselftest_harness.h" #include "../statmount/statmount.h" #include "../utils.h" -// Needed for linux/fanotify.h -#ifndef __kernel_fsid_t -typedef struct { - int val[2]; -} __kernel_fsid_t; -#endif - -#include <sys/fanotify.h> - static const char root_mntpoint_templ[] = "/tmp/mount-notify_test_root.XXXXXX"; static const int mark_cmds[] = { diff --git a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c index 090a5ca65004..9f57ca46e3af 100644 --- a/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c +++ b/tools/testing/selftests/filesystems/mount-notify/mount-notify_test_ns.c @@ -2,6 +2,13 @@ // Copyright (c) 2025 Miklos Szeredi <miklos(a)szeredi.hu> #define _GNU_SOURCE + +// Needed for linux/fanotify.h +typedef struct { + int val[2]; +} __kernel_fsid_t; +#define __kernel_fsid_t __kernel_fsid_t + #include <fcntl.h> #include <sched.h> #include <stdio.h> @@ -10,21 +17,12 @@ #include <sys/mount.h> #include <unistd.h> #include <sys/syscall.h> +#include <sys/fanotify.h> #include "../../kselftest_harness.h" -#include "../../pidfd/pidfd.h" #include "../statmount/statmount.h" #include "../utils.h" -// Needed for linux/fanotify.h -#ifndef __kernel_fsid_t -typedef struct { - int val[2]; -} __kernel_fsid_t; -#endif - -#include <sys/fanotify.h> - static const char root_mntpoint_templ[] = "/tmp/mount-notify_test_root.XXXXXX"; static const int mark_types[] = { -- 2.50.1

1 week, 5 days

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[PATCH bpf-next v2 1/2] bpf: add bpf_strcasecmp kfunc

by Rong Tao

From: Rong Tao <rongtao(a)cestc.cn> bpf_strcasecmp() function performs same like bpf_strcmp() except ignoring the case of the characters. Signed-off-by: Rong Tao <rongtao(a)cestc.cn> --- kernel/bpf/helpers.c | 68 +++++++++++++++++++++++++++++++------------- 1 file changed, 48 insertions(+), 20 deletions(-) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 401b4932cc49..238fd992c786 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3349,45 +3349,72 @@ __bpf_kfunc void __bpf_trap(void) * __get_kernel_nofault instead of plain dereference to make them safe. */ -/** - * bpf_strcmp - Compare two strings - * @s1__ign: One string - * @s2__ign: Another string - * - * Return: - * * %0 - Strings are equal - * * %-1 - @s1__ign is smaller - * * %1 - @s2__ign is smaller - * * %-EFAULT - Cannot read one of the strings - * * %-E2BIG - One of strings is too large - * * %-ERANGE - One of strings is outside of kernel address space - */ -__bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) +int __bpf_strcasecmp(const char *s1, const char *s2, bool ignore_case) { char c1, c2; int i; - if (!copy_from_kernel_nofault_allowed(s1__ign, 1) || - !copy_from_kernel_nofault_allowed(s2__ign, 1)) { + if (!copy_from_kernel_nofault_allowed(s1, 1) || + !copy_from_kernel_nofault_allowed(s2, 1)) { return -ERANGE; } guard(pagefault)(); for (i = 0; i < XATTR_SIZE_MAX; i++) { - __get_kernel_nofault(&c1, s1__ign, char, err_out); - __get_kernel_nofault(&c2, s2__ign, char, err_out); + __get_kernel_nofault(&c1, s1, char, err_out); + __get_kernel_nofault(&c2, s2, char, err_out); + if (ignore_case) { + c1 = tolower(c1); + c2 = tolower(c2); + } if (c1 != c2) return c1 < c2 ? -1 : 1; if (c1 == '\0') return 0; - s1__ign++; - s2__ign++; + s1++; + s2++; } return -E2BIG; err_out: return -EFAULT; } +/** + * bpf_strcmp - Compare two strings + * @s1__ign: One string + * @s2__ign: Another string + * + * Return: + * * %0 - Strings are equal + * * %-1 - @s1__ign is smaller + * * %1 - @s2__ign is smaller + * * %-EFAULT - Cannot read one of the strings + * * %-E2BIG - One of strings is too large + * * %-ERANGE - One of strings is outside of kernel address space + */ +__bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) +{ + return __bpf_strcasecmp(s1__ign, s2__ign, false); +} + +/** + * bpf_strcasecmp - Compare two strings, ignoring the case of the characters + * @s1__ign: One string + * @s2__ign: Another string + * + * Return: + * * %0 - Strings are equal + * * %-1 - @s1__ign is smaller + * * %1 - @s2__ign is smaller + * * %-EFAULT - Cannot read one of the strings + * * %-E2BIG - One of strings is too large + * * %-ERANGE - One of strings is outside of kernel address space + */ +__bpf_kfunc int bpf_strcasecmp(const char *s1__ign, const char *s2__ign) +{ + return __bpf_strcasecmp(s1__ign, s2__ign, true); +} + /** * bpf_strnchr - Find a character in a length limited string * @s__ign: The string to be searched @@ -3832,6 +3859,7 @@ BTF_ID_FLAGS(func, bpf_iter_dmabuf_destroy, KF_ITER_DESTROY | KF_SLEEPABLE) #endif BTF_ID_FLAGS(func, __bpf_trap) BTF_ID_FLAGS(func, bpf_strcmp); +BTF_ID_FLAGS(func, bpf_strcasecmp); BTF_ID_FLAGS(func, bpf_strchr); BTF_ID_FLAGS(func, bpf_strchrnul); BTF_ID_FLAGS(func, bpf_strnchr); -- 2.51.0

1 week, 5 days

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[PATCH bpf-next v2 0/2] bpf: Add kfunc bpf_strcasecmp()

by Rong Tao

Kfunc already support bpf_strcmp, this patchset introduce bpf_strcasecmp and add some selftests. Rong Tao (2): bpf: add bpf_strcasecmp kfunc selftests/bpf: Test kfunc bpf_strcasecmp kernel/bpf/helpers.c | 68 +++++++++++++------ .../bpf/progs/string_kfuncs_failure1.c | 6 ++ .../bpf/progs/string_kfuncs_failure2.c | 1 + .../bpf/progs/string_kfuncs_success.c | 5 ++ 4 files changed, 60 insertions(+), 20 deletions(-) --- v2: Remove __ign prefix from __bpf_strcasecmp and add E2BIG failure test; v1: https://lore.kernel.org/lkml/tencent_5AE811A28781BE106AD6CDE59F4ADD2BFA06@q… -- 2.51.0

1 week, 5 days

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[PATCH bpf-next 1/2] bpf: add bpf_strcasecmp kfunc

by Rong Tao

From: Rong Tao <rongtao(a)cestc.cn> bpf_strcasecmp() function performs same like bpf_strcmp() except ignoring the case of the characters. Signed-off-by: Rong Tao <rongtao(a)cestc.cn> --- kernel/bpf/helpers.c | 56 +++++++++++++++++++++++++++++++++----------- 1 file changed, 42 insertions(+), 14 deletions(-) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 401b4932cc49..e807a708e5fc 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -3349,20 +3349,7 @@ __bpf_kfunc void __bpf_trap(void) * __get_kernel_nofault instead of plain dereference to make them safe. */ -/** - * bpf_strcmp - Compare two strings - * @s1__ign: One string - * @s2__ign: Another string - * - * Return: - * * %0 - Strings are equal - * * %-1 - @s1__ign is smaller - * * %1 - @s2__ign is smaller - * * %-EFAULT - Cannot read one of the strings - * * %-E2BIG - One of strings is too large - * * %-ERANGE - One of strings is outside of kernel address space - */ -__bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) +int __bpf_strcasecmp(const char *s1__ign, const char *s2__ign, bool ignore_case) { char c1, c2; int i; @@ -3376,6 +3363,10 @@ __bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) for (i = 0; i < XATTR_SIZE_MAX; i++) { __get_kernel_nofault(&c1, s1__ign, char, err_out); __get_kernel_nofault(&c2, s2__ign, char, err_out); + if (ignore_case) { + c1 = tolower(c1); + c2 = tolower(c2); + } if (c1 != c2) return c1 < c2 ? -1 : 1; if (c1 == '\0') @@ -3388,6 +3379,42 @@ __bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) return -EFAULT; } +/** + * bpf_strcmp - Compare two strings + * @s1__ign: One string + * @s2__ign: Another string + * + * Return: + * * %0 - Strings are equal + * * %-1 - @s1__ign is smaller + * * %1 - @s2__ign is smaller + * * %-EFAULT - Cannot read one of the strings + * * %-E2BIG - One of strings is too large + * * %-ERANGE - One of strings is outside of kernel address space + */ +__bpf_kfunc int bpf_strcmp(const char *s1__ign, const char *s2__ign) +{ + return __bpf_strcasecmp(s1__ign, s2__ign, false); +} + +/** + * bpf_strcasecmp - Compare two strings, ignoring the case of the characters + * @s1__ign: One string + * @s2__ign: Another string + * + * Return: + * * %0 - Strings are equal + * * %-1 - @s1__ign is smaller + * * %1 - @s2__ign is smaller + * * %-EFAULT - Cannot read one of the strings + * * %-E2BIG - One of strings is too large + * * %-ERANGE - One of strings is outside of kernel address space + */ +__bpf_kfunc int bpf_strcasecmp(const char *s1__ign, const char *s2__ign) +{ + return __bpf_strcasecmp(s1__ign, s2__ign, true); +} + /** * bpf_strnchr - Find a character in a length limited string * @s__ign: The string to be searched @@ -3832,6 +3859,7 @@ BTF_ID_FLAGS(func, bpf_iter_dmabuf_destroy, KF_ITER_DESTROY | KF_SLEEPABLE) #endif BTF_ID_FLAGS(func, __bpf_trap) BTF_ID_FLAGS(func, bpf_strcmp); +BTF_ID_FLAGS(func, bpf_strcasecmp); BTF_ID_FLAGS(func, bpf_strchr); BTF_ID_FLAGS(func, bpf_strchrnul); BTF_ID_FLAGS(func, bpf_strnchr); -- 2.51.0

1 week, 5 days

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